Isn't Benat more of a Deep Lying Playermaker in the mold of Pirlo while Herrera plays in a more advanced position ?

Technically yes. Benat is a lot like Xavi, and Herrera plays the same position but with different characteristics. Athletic's midfield was Iturraspe-Herrera-Susaeta, so Benat's would have to come for Herrera the way I see it. Maybe chains5000 will chime in and give his 2 cents.